Dentistry – Orthodontics – Including extra-oral force transmitting means
Patent
1982-01-07
1984-02-14
Peshock, Robert
Dentistry
Orthodontics
Including extra-oral force transmitting means
A61C 700
Patent
active
044314108
ABSTRACT:
A facebow for use in orthodontic procedures is provided with relatively universal adjustability to permit use of a single size of facebow in mouths of a variety of different sizes and further facilitating selective unilateral movement. To this end, the facebow is formed with a conventional outer bow for securement to a cervical elastic strap or head gear; and an inner bow contoured to fit into the mouth of the patient along the dental arch, preferably approximating the molars. The inner bow is secured to the outer bow, and the inner bow is formed with at least a pair of mesial loops arranged to lie along the surface of the teeth over which the inner bow is positioned. These loops provide the four-fold function of (1) providing means for the dentist to adjust the effective length of the inner bow by increasing or decreasing the curvature of the loop; (2) permitting selective unilateral pressure to be applied to the dental arch; (3) providing an added variable site for affixing auxiliary attachments, such as hooks and springs; and (4) providing a finger engaging seat to facilitate facebow manipulation. Additional adjusting loops may be arranged along the inner archwire, again oriented in the plane of the wire along the teeth against which the inner bow is positioned, extending either upwardly or downwardly with respect to the wire. The loops are preferably formed of a height between 30% and 300% of the tooth height or "clinical crown," and a spacing between the legs of the loop between 25% and 150% of loop height.
REFERENCES:
patent: 1103606 (1914-07-01), Monteg
patent: 4202100 (1980-05-01), Foster
patent: 4268250 (1981-05-01), Reeve
Fiddler Robert W.
Peshock Robert
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